“Basically, the Fallen is to them [Transformers and Decepticons] what cavemen, Neanderthals were to us. He’s the ancestor, the first version of this exoskeleton. He’s the first version of this sentient being. That’s what he is. He’s the origins of what they came from.”

Shia Labeouf

The Fallen is maybe old, but he is far from being outdated: he’s no threat to ignore… :)